This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 16 |
| 3 | 41 |
| 4 | 93 |
| 5 | 196 |
| 6 | 394 |
| 7 | 771 |
| 8 | 1488 |
| 9 | 2854 |
| 10 | 5463 |
| 11 | 10479 |
| 12 | 20186 |
| 13 | 39068 |
| 14 | 75932 |
| 15 | 148083 |
| 16 | 289822 |
| 17 | 569157 |
| 18 | 1120940 |
| 19 | 2212591 |
| 20 | 4374466 |
| 21 | 8658470 |
| 22 | 17159606 |
| 23 | 34050575 |
| 24 | 67642478 |
| 25 | 134489509 |
| 26 | 267565204 |
| 27 | 532549215 |